Shoe-guide for well-casings.



A, c'. GRAHAM. SHOE GUIDE FOR WELL CASINGS.

APPLICATION FILED DBO. 7,1909.

970,812. Patented sept. 2o, 1910.

BV r

Arron/vers ALBERT c. GRAHAM,v or oILFxLns, CALIFORNIA, t

suon-GUIDE ron. WELL-mismos.

Speclcation of Letters Patent. Patented Sept. 20,

Application led December 7, 1909. Serial No. 531,757.

ings, of which the' following is a full, clear,

and exactdescription.

In the driving of wells it `sometimes happens that a sect1on or stringof-wellcasing or a liner, parts or the liner collapsesI This lseparat/edparts.

is generally repaired by leaving the parted casing or liner in the 'welland lowering another string of casingor liner within the Considerablediiiculty is generally experienced in passingthe smaller l is knocked.from the Well casin crushed into fragments in the we l and after-l ierence indicate casing or'liner within the lower section or part of theparted Acasing or liner. I have successfully overcome this ditliculty inpractice by my shoe-guide, which-'is constructed with a tapering guidinghead .to easily-.pass within thecasing, and has a neck adapted to fittightly vwithin the shoe, the entire guide being in the nature-of a'shell of cast iron or other material more readily fragile thantheucasing or theshoe, so that when the shell it is easily ward removed.t

Reference is to be had to the accompanying drawings forming apart ofthis specification, in 4which .similar characters of refcorrespondingparts in both the views. y v

Figure 1 is aI central vertical section through 'a Well, showing thelower -part or sect-ion of a parted casing and a section or string ofsma 4 shoe-guide, the latter being in' a position pre aratory toventering the larger casing; an Fig, 2 is a perspectlve view of theshoeguide remo'ved rom the shoe.

The shoe-guide as referably constructed comprises a tapering ead 10 anda neck 11,y

the neck extendinvr from the enlarged -end of the head and otpa size tobe easily driven within a casing shoe 12, the latter being'a commondevice in vwell construction, and, as shown, is constructed with aninternallythreaded portion 12g adapted to fit over and ler casing havingmy improved l Witnesses:

screw on the lower end of aline or section of well casing 13, and isprovided with a lower. ortion 14 of an internal diameter approxlmatelyequal to that of the well casin to which it is applied. Into thisinterna reduced portion of the shoe, the neck of my improved shoe-guideis desi ed to` tifghtly lit. ,The shoeu ide is in t e form;y o a shellopen throug out. its length so ast not to choke Ithe-well passage, andis made ofcast iron or othersuitable material more readil l fragile thanthe casing or shoe so that 1t is easily crushed into fragments. Themaximum diameter ofthe shoe-guide, which is preferably at the shoulderbetween the head 10 .and neck 11, is equal to or slightly 'greater`thanthe diameter of the shoe, so that the shoe as well as the strin of wellcasin or liner will freely enter and pass within t e lower art orsection 15 of the parted casing or mer after the Ashoeguivde is entered.After the vsmaller section of the well casing or liner is entered withinthe .largercasing or liner, the shoe-guideis. knocked out by a suitabletool entered from the top of the well, afterwhiclh the guide is easilycrushed into fragments 'and removed...,

Having thus described my invention, I claim as new and desireto secureby Letters Patent:

1. A guiding device for directingone section of well casing withinanother, constructed of a ,fragile material, whereby itis adapted to becrushed into fragments within t e Well and removed therefrom through thecasing. L v L 2. The combination of a section of well casing, a shoecarried by the lowerend of the said section of wellcasing, and a shellto direct the section of well casing into a larger section of wellcasing,removably applied Vto the shoe and of a .material more readilyfragile than the shoe or well casing.

In Itestimony whereof I have signed my.

namel to this specification in the presence of two lsubscribingwitnesses. A ALBERTi. GRA-HAM.

D. Haoom, R. S. FINE.

